keystone

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Proponents hailed lions as a keystone species that enhances biodiversity and pointed out the affection they generate — from Los Angeles’ late, famed P-22 to the lion that recently strolled through San Francisco.

From Los Angeles Times • Feb. 12, 2026

Last year, some 1,000 U.S. troops withdrew from neighboring Niger, ending a nearly decadelong partnership that was the keystone of U.S. counterterrorism operations in the region.

From The Wall Street Journal • Nov. 2, 2025

They "play a central role in the food web, consuming fish and invertebrates and recycling nutrients" and are one of the "keystone species" of their ecosystem.

From Barron's • Oct. 10, 2025

"This is a keystone appointment for us and an integral part of our five-year strategy as we look to achieve sustainable success for our senior men's side," said Tierney.

From BBC • Jul. 21, 2025

There was a general shout of outrage, and then we recommended the building of Leper’s triumphal arch around Brinker’s keystone.

From "A Separate Peace" by John Knowles